Lock



Nov. 3, 1925- 1,560,424

A. e. HJERT LOCK 7 Filed May 21. 192a s Sheets-Sheet 1 INVENTOR mus A'I'I'ORNEY 1,560,424 A. G. HJERT I Nov. 3 1925.

LOCK

Filed lay 21. 1923 3 Sheets-Sheet 2 INVINIOR A. G. HJERT Nov. 3, 1925.

- LOCK Filed May 21. 1923 3 Sheets-Sheet 3 ATI'ORNEY Patented Nov. 3, 1925.

UNITED STATES TENT OFFICE.

ANDREW e. HJER'I, or sEAr'rEE, wasnrneron.

oon.

Application filed May 21, 1928-. Serial No. 640,582.

This invention relates to improvements in 2 looks, the general objectof the invention being to provide a look that can be easily and quickl einanipulated to project and retract its bolts and which is practically burglar proof.

This invention also consists in certain: other features of constructionand, in the combination andarrangeinent of theseveral parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out 1n the appended claims.

In describing my invention in detail, ref-.

erence will be had to the accompanying drawings wherein like characters denote like or corresponding vparts throughout the several views,.and-1n whichz- Figure 1 is a view showing one side of a door with my lock in position.

Figure 2 is a view of the opposite side of the door. I I

Figure 3 is an edge view of a door supplied with iny lock. 7

Figure 4 is asection on lined-4; of Figure 8. a

Figure 5 is a section on. line 55 of Figure 4.

Figure 6 is a section on line 6-6 of'Figure 4.

showing a modification.

Figure 8 is a similar view of modified means for locking-the bell crank 15 against movement.

Figure 9 is a fragmentary sectional view showing modified means for operating the bolt 4 by the knobs.

Figure 10 is an end View of one of the knobs in Figure 9. a

Figure 11 is a view of the key used with this form of the invention.

Figures 12 and 13 are sectional detail views of a modified form ofbarrel.

Figures 14 and 15 are detail 'views of one of the parts shown in Figure 9.

In these views A indicates the door Figure 7 is a fragmentary sectional viewthrough which the. plates 1 and 2 are 'connected and in which the lock casing 3 isinserted. This casingcarries the boltst and 5, thebolt 4 being provided with thelugs 6, one of which will engage the lug7on the bolt 5 so that movement of the bolt 41 will be @0111 inunicated to the bolt .5. The bolt 4 is provided with the usual spring 8 and; it is also provided with the projections 9" whichare engagediby the. lever 10 which is actuatedby the shank 11. of the inside. knob 12; Thisv bolt can be also operated from the outs de by means of the thumb latch- 13 pivoted to' the outside plate 2 above the handle 14 on the plate and which engages the'bell crank 15 pivoted in the casing andhavin one end engaging the bolt. This. bell cran can be held a ainst movement by means of the sliding be t 16 which iscontrolled by the spring 17 and which is operated by the push buttons 18 which pass through the. frontof, the casing in the edge of. the door. Instead of operating the bolt v16 b a the buttons it may be operated 'by the S1 6 19 which actuates therbell crank 20 which is arranged to push the bolt '16 inwardlyagainst the action of its spring 21. This arrangement ofparts is shown in Figure 8.

A lever22is pivoted in the casing and has one end. connected with the bolt 5 and its other end has rotatably connected there-- with a collar 23 which carries the pins 24: which are engaged by the springs 25. This arrangement of parts serves to hold the'bolt in either its retracted or projected positions and also acts to take up any play or slack 'in the movement of the bolt. The key barally connected with the bolt 5 and is held acrossthe notch 29 by a spring 32. This plate acts to hold the barrel in proper posi tion and when the barrel iswturned the lug 27 will force said plate downwardly so that said lug will engage the notch and thus move the bolt rearwardly. Further movement of the barrel will cause the lug 28 to strike the arm 33 of thelever'34 which has its lower end engaging one ofthe lugs6 on and projected positions. This arrangement of parts is shown in Figure 7.

The barrel is composed of the cylinder 37 having the endcaps 38 screwed thereto and having a plug 39 screwed therein and containing the passage for the key. Each cap 38 is provided with a key hole 40 for receiving the key 41. By making" the part 39 in the form of a screw plug it the key is lost or stolen, said plug may have its position in the barrel changed by a screw driver or the like so as to render the old key' useless. The barrel is provided with the usual projections 42 for receiving the projections of the key. The position of the lugs 27 and 28 and the plate 31 renders it impossible for one to pry open the lock.

From the foregoing it will be seen that the lock can be set so that it can be opened from the inside by the knob 12 or by means of the key 41 placed in the barrel 26. It can also be set so that it can be opened by the thumb latch 13 from the outside or the parts can be so set that the bolts cannot be retracted except by a key which is inserted in the barrel. The use of the key will retract both bolts but whenv the parts are to be set so that they can be opened from the outside by the latch-13 the bolt must be retracted, the lever 22 or the plate 31 holding it in retracted position.

Instead of using the latch lever for operating the bolt 4 I may do this by means of the door knobs. This is shown'in Figures 9, 10, 11, 14'and where the knobs 45 and 46 are rotatably connected with the plates 1 and 2 by the pins 45 carried by the tubular parts 45 and engaging grooves 45 in the knobs. The parts 45 are bolted to the plates land 2 and the nuts of these bolts are arranged within thedoor and the bolts engage the plates 46 which act as stops for preventing inward movement of the knobs. The knobs carry spring pressed plungers 47 which engage the lever 10, the plunger of the outside knob being provided with the tapered head 48 for engaging the tapered socket 49 in the lever and the square inner end of the plunger of the knob 45 passing through a hole in the lever and acting to force the head 48 out of the socket when it is pressed inwardly by a key 51. When the head is in engagement with the socket the lever can be turned by both knobs but when it is forced from the socket it cannot move the lever though the lever can be moved by the inside knob as the square part of the plunger of this inside knob engages a square hole in the lever. The inside knob is provided with the cross-shaped hole 52 and 52 for receiving the key 51. When the key is it from returning to normal position. Thus the head 48 will be held out of the socket so that the bolt cannot be moved by the outside knob. By inserting a key in the part 52 of the opening the latches 53' can be retracted so as to permit the spring to return the plunger, 47 to its normal position.

The head 48 will then engage the socket so that the bolt can be operated by the outside knob.

I may also provide a safety cylinder for the barrel which is shown in Figures 12 and 13. In this case the cylinder is provided with an inside part54 which is connected with the rotary part ofthe barrel and an outside stationary part 55 which is connected with part of the casing. Spring pressed dogs 56 are arranged in the part 54, the springs of which tend to hold the dogs in engagement with slots 57 in the stationary part so that the barrel cannot be turned until the dogs are freed of said slots. The ends of the dogs are arranged in the key hole so that the passage of the key will push the dogs inwardly and free them ofthe slots.

It is thought from the foregoing description thatthe advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

lVhat I claim is 1. A look of the class described comprising a casing, a spring actuated bolt and a dead bolt therein, projections on the bolts, the projection on the spring .bolt lying in front of the projection .on the dead bolt, a lever pivoted in the casing and engaging the projection on the spring bolt, an arm on the upper end of the lever, a T-shaped barrel, projections thereon for engaging parts on the dead bolt and one of said projections engaging the arm on the lever to cause the lever to retract the spring bolt, a knob operated member for retracting the spring bolt, a latch operated member for retracting the spring bolt and means for preventing movementof the spring bolt by the latch operated member when desired.

2. A look of the class described comprising a casing, a bolt carried thereby, a lever for actuating the bolt, said lever having a socket therein and a square bore communicating With the socket, a knob on the inner face of the casing, a spring plunger carried thereby and having a square part engaging the square bore, a knob on the outside of the casing, a spring plunger carried thereby and havmg a head thereon for engaglng the socket and a key for forcing the plunger of the inner knob inwardly against the other plunger to force the head out of the socket 10 to prevent movement of the lever by the outside knob and spring actuated means for holding the plunger of the inner knob in projected position. 4

In testimony whereof I affix nay signature.

ANDREW GUST. HJERT. 

